These are the customisation options specific to Polar Area charts. These options are merged with the [global chart default options](#default-options), and form the options of the chart.
| `startAngle` | `Number` | `-0.5 * Math.PI` | Starting angle to draw arcs for the first item in a dataset.
| `animation.animateRotate` | `Boolean` | `true` | If true, the chart will animate in with a rotation animation. This property is in the `options.animation` object.
| `animation.animateScale` | `Boolean` | `true` | If true, will animate scaling the chart from the center outwards.
## Default Options
We can also change these defaults values for each PolarArea type that is created, this object is available at `Chart.defaults.polarArea`. Changing the global options only affects charts created after the change. Existing charts are not changed.
For example, to configure all new polar area charts with `animateScale = false` you would do:
For a polar area chart, datasets need to contain an array of data points. The data points should be a number, Chart.js will total all of the numbers and calculate the relative proportion of each.
You also need to specify an array of labels so that tooltips appear correctly for each slice.
```javascript
data = {
datasets: [{
data: [10, 20, 30]
}],
// These labels appear in the legend and in the tooltips when hovering different arcs